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Wednesday, December 07, 2022 6:08:24 AM
Source
https://www.newstrail.com/wimi-hologram-cloud-to-develop-holographic-optical-chips/
December 7, 2022
With the increasing popularity of 5G, AIoT, cloud computing, and other technologies, more industries have an increasing demand for data transmission. At the same time, optical modules, as essential devices for photoelectric conversion of data centers, are also developing rapidly. Among them, the transmission speed of the optical module is determined by the performance of the optical chip, which is the key to the whole industry chain. Take the optical communication industry chain for example. The optical chip is at the forefront of the industrial chain, and its production cost is more than 50%. It is the most complex and valuable part of the optical fiber communication industry chain.
An optical chip is a large number of optical components integrated into a two-dimensional space, with the characteristics of super large scale, ultra-low power consumption, and extremely low cost is one of the key technologies to realize optical interconnection, optical computing, and optical communication. Chip integration is made by micromachining the process of using the required lithography or etching, etching circuits, or components of the chip. The photonic integration unit used in chip integration technology has an extremely high integration degree and packaging density, which can achieve faster information processing speed in high-speed transmission, which provides good conditions for WiMi Hologram Cloud, Inc. (NASDAQ: WIMI) to conduct an in-depth study of optical communication.
According to the function of the photonic integration unit, it is usually divided into the optical phased array (OPA), optical waveguide integrated chip (WCCG), and photonic crystal microcavity chip (TPWI), in which laser interference stripe patterning, diffraction beam focusing and beam control are the two main components. Optical beam steering is a key technology for lidar systems, but conventional mechanical-based beam steering systems are large, expensive, vibration-sensitive, and with limited speed. WiMi Hologram Cloud, Inc. (NASDAQ: WIMI) is developing an optical holographic chip that enables wide-field beam control without affecting beam quality for small, cost-effective, and high-performance lidar systems.
The optical holographic chip studied by WIMI refers to an integrated system composed of several optical devices with different diffraction efficiency. Its characteristic is that the optical function required by each unit can be reused, so its scale is smaller than that of traditional chips. An optical holographic chip with a plate grating can replace traditional OPA to create a single emitter. This setup eliminates the aliasing error because the adjacent channels in the plate grating can be very close to each other. In plate gratings, the coupling between adjacent channels is not harmful because it enables interference and beam formation in the near field (near the single emitter). The light then hits the far field at an ideal angle. Compared with traditional microcavities, it can effectively eliminate background noise and reduce other optical artifacts.
The application of optical holographic technology in photonic integrated chips has great advantages, which can not only meet the needs of multi-dimensional imaging and sensing but also simplify the chip design and realize large-scale array devices. In addition, the application of optical holographic technology in many fields will bring more possibilities for photonics, such as multi-dimensional information processing, image processing, and analysis, light field storage and decoding, and so on.
WiMi discusses and analyzes the application of optical holographic technology in an optical chip from different directions. After exploring the future research trend, it can be found that holographic technology will play an important role in both optical communication and optical computing. Therefore, WiMi has decided to strengthen the in-depth research of the existing holographic technology to provide new ideas for the development of more fields.
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